GPU Shark is a simple, lightweight and free GPU monitoring tool for GeForce and Radeon based graphics cards and is available for Windows only. GPU Shark offers a global view of all your graphics cards in a single window.

v. 1.11.0
Full set of Device IDs is now displayed in the main window. This can be used to file a compensation claim in the GTX 970 lawsuit.
Added support for BIOS saving on GTX 1060
Tray notification icon creation code improved

v.1.14.0
Added support for Wattman overclocking on older AMD Radeon cards
Fixed memory leak when running for long time on NVIDIA Pascal
Fixed driver WHQL detection
WHQL status is now displayed after the version name
Fixed reporting format of PCIe bus interface
Integrated graphics now display N/A as bus interface
Fixed double error message on startup when log file can't be written to
Fixed Kaveri DDR3/DDR4 detection
Added support for AMD Radeon Pro Duo, WX 7100, WX 5100, WX 4100, early support for AMD Stoney
Added support for VIA graphics
Fixed clock reading on AMD cards which do not support Wattman

v. 1.18.0 adds support for new GPUs, and comes with several improvements.
support for AMD Radeon RX 580, RX 570, RX 560, and RX 550; and NVIDIA GeForce GTX 1080 Ti, Quadro P4000, P1000, P600, and P400.
Support is also added for Intel "Apollo Lake" Pentium N4200 integrated graphics.
displays the latest version number for update checks